21102039304 has 32 divisors (see below), whose sum is σ = 40065480000. Its totient is φ = 10418501952.

The previous prime is 21102039253. The next prime is 21102039307. The reversal of 21102039304 is 40393020112.

It is not an unprimeable number, because it can be changed into a prime (21102039307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250887 + ... + 324265.

It is an arithmetic number, because the mean of its divisors is an integer number (1252046250).

Almost surely, 2^21102039304 is an apocalyptic number.

It is an amenable number.

21102039304 is a deficient number, since it is larger than the sum of its proper divisors (18963440696).

21102039304 is a wasteful number, since it uses less digits than its factorization.

21102039304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73837 (or 73833 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21102039304 its reverse (40393020112), we get a palindrome (61495059416).

The spelling of 21102039304 in words is "twenty-one billion, one hundred two million, thirty-nine thousand, three hundred four".